Plating carrier drive for knitting machines



Nov. 15, 1949 u. PIANTA 2,487,943

PLATING CARRIER DRIVE FOR KNITTING MACHINES Filed April 17, 1947 Patented Nov. 15, 1949 HINES Ubaldo Pianta, Milan, Italy, assignor to Societa 'Italiana Ernesto Breda Per Costruzioni Meccaniche, Milan, Italy, a firm Application April 17, 1947, Serial No. 742,182 In Italy April 3, 1946 Section 1, Public Law 690, August 8, 1946 Patent expires April 3, 1966 In present straight-bar machines for hosiery and the like, and particularly in straight-bar Cottons machines, the drive of the plating carriers was attained by several actuating slides or slippers, or by other complicated devices.

The same result is obtained more simply by the present invention with a single slide, by means of an automatic recuperation device.

According to the invention, the slide bears one of the carriers and a slipper bearing the other carrier is mounted longitudinally slidable on said slide; at the two ends of the slide stroke means are provided to return the slipper to a predetermined position relative to the arriving slide and means to hold said slipper stationary while the slide starts its reverse movement.

In order to better explain the above invention, an embodiment given by way of example is non described with reference to the attached drawing, in which:

Fig. 1 is a front view of the device at the beginning of the forward stroke;

Fig. 2 is a plan view of Fig. 1;

Fig. 3 is a front view of the device at a certain phase of the forward stroke;

Fig. 4 is a plan view of Fig. 3;

Fig. 5 is a front view of the device at the end of the forward stroke.

In this device a reciprocating bar I is slidably mounted in frame members I a.

The reciprocating bar I is integral with the friction slide 2 on which the carrier I0 is fixed. The slipper 3 bearing the carrier 9 is placed in sliding guides on the slide 2.

When starting the motion, the bar I drags the slide 2, while the slipper 3 is held by the lever 6; thereby, the carrier 9 starts with some delay with respect to the carrier ID. The amount of this delay is established by the position of the nose I i placed on the slide 2; actually said nose raises the lever 6 against the action of respective springs 12 carried by the frame members Ia whereby to leave the slipper free when the latter has reached the predetermined delayed position, so that the carriers 9 and ill take the relative positions shown in Fig. 3.

Said positions are maintained during the whole of the remaining portion of the stroke of the bar i and slide 2.

At the end of the forward stroke the amplifying lever 4, pivoted on the slide 2 and having the nose 4' of its major arm 4" engaged in the depression 3' of the slipper 3, pivots owing to the reaction of the minor arm 4" on the screw 5;

. 3 Claims. (Cl. 66-126) due to said swinging of the lever 4, the slipper 3 is forced to move recovering the former position of the carrier 9 with respect to the carrier [0.

The lever S engages the slipper 3 automatically, due both to gravity and action of the fiat spring l2.

At one side of the slipper 3 there is provided at-each end a pair of adjacent lugs i5 forming a notch it between each pair. Carried by the lever 4 is a coiled spring I! having arms l8 projecting towards the end of the slipper. Each arm carries a head l9 provided with a nose 20 of a size and shape to fit a respective notch Hi. The distance between the noses 20 is substantially equal to the distance between the pairs of lugs l5 as indicated in Fig. 2 and biassing of the lever 4 will cause a nose to engage the respective notch It as in Fig. 4. This construction forms a snap means for latching the slipper to the slide.

At the beginning of the backward stroke of the bar, the same steps as in the forward motion are repeated, the lever B acting in the similar way as the lever 6 so as to let the carrier 9 start with some delay with respect to the carrier ill, with consequent recuperation at the end of the stroke of bar I, and so on for each forward and backward stroke of the same. As the slipper is reciprocated the arm 4" of the lever 4 contact with adjustable screw stops 5, 5', which effect proper biassing of the lever to effect movement of the slipper 3 on the slide 2.

Obviously, many of the constructional details described above by way of example may be either replaced or modified without exceeding the scope of the invention.

I claim:

1. In a plating carrier drive in a straight-bar knitting machine for hosiery and the like, a slide, a slipper reciprocable longitudinally on said slide, a pair of spaced frame members between which said slide reciprocates, latch levers each pivoted to a respective frame member and each having a trip arm, and trip lugs at the ends of said slide engageable with the trip arms upon movement of the slide a predetermined distance from the ends of its reciprocation, other lugs on the slipper engaged by said latch levers at the ends of the reciprocation of said slide, the engagement of said trip arms with said trip lugs freeing the latch levers from the lugs on the slipper.

2. In a plating carrier drive in a straight-bar knitting machine for hosiery and the like, a slide, a slipper reciprocable longitudinally on said slide, a pair of spaced frame members between which said slide reciprocates, latch levers each pivoted to a respective frame member and each having a trip arm, trip lugs at the ends of said slide engageable with the trip arms upon movement of the slide a predetermined distance from the ends of its reciprocation, other lugs on the slipper engaged by said latch levers at the ends of the reciprocation of said slide, the engagement of said trip arms with said trip lugs freeing the latch levers from the lugs on the slipper, and coacting snap means latching the slipper against movement on the slide during'reciprocation of the slipper between said latch hooks.

3. In a platin carrier drive in a straight-bar knitting machine for hosiery and the like, a slide, a slipper reciprocable longitudinally on said slide, a pair of spaced frame members between which said slide reciprocates, latch levers each pivoted to a respective frame member and each having a trip arm, trip lugs at the ends of said slide engageable with the trip arms upon movement of the slide a predetermined distance from the ends of its reciprocation, other lugs on the slipper REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Zimic et a1. Dec. 13, 1938 Number 

